Mylar bag thickness explained: 3 to 6 mil.
Mylar bag thickness is measured in mil, one thousandth of an inch. On TWO Packaging’s order page you choose it yourself, from 3 mil (0.076 mm) to 6 mil (0.152 mm), for every material.

Order custom mylar bags online: any size from 500 bags, $535.34 delivered for 500 4″ × 6″ stand-up pouches, your art placed on your dieline and an instant 3D proof.
See my priceMil to millimetres
| Thickness | Millimetres | How it feels |
|---|---|---|
| 3 mil | 0.076 mm | Sturdy and flexible: the everyday choice for most retail pouches |
| 4 mil | 0.102 mm | Noticeably more substantial in the hand |
| 5 mil | 0.127 mm | Thick and firm; holds its shape on a shelf |
| 6 mil | 0.152 mm | Our heaviest gauge, for large and heavy fills |
Holographic film also comes in half-mil steps from 3 to 5 mil.
How to choose
- Most products: 3 or 4 mil.
- Heavier fills and larger bags: 5 or 6 mil, so the bag stands tall and feels premium.
- A premium feel: one step thicker than you need, paired with a soft-touch finish.
Price
A thicker film uses more material and weighs a little more, so each step up adds a small amount to your delivered price. The order page shows it for your exact bag the moment you choose a thickness.
Frequently asked questions
What does mil mean on a mylar bag?
A mil is one thousandth of an inch, or 0.0254 mm. A 3 mil bag is 0.076 mm thick and a 5 mil bag is 0.127 mm thick.
What thickness should my mylar bag be?
3 or 4 mil suits most products. Choose 5 or 6 mil for heavy fills, large bags or a firmer, more premium feel.
Can I choose the thickness of my custom mylar bags?
Yes. On TWO Packaging’s order page you choose 3 to 6 mil for every material, and the price updates instantly.